Dynamic Time Stamps change their date/time whenever someone clicks on them or the PDF document is being printed. Please see a sample PDF document here. Just print it several times to see that every printout will contain a different timestamp.
To activate dynamic time stamping please go to the Aloaha installation folder, open the file DynamicTimeStamp.ini and set the value activated to 1. The PDF Suite has to be re-started so that changes in the ini file become active.